File sharing between two networked macs

I recently purchased a Macbook pro, with Leopard pre-installed. Using a router, I created a network between my iMac (that I already had) and this new Macbook. My problem is that I can access any folders, even the whole hard drive of the Macbook from the iMac, but from the Macbook, I can only access the administrator folder of the iMac. I checked all of file sharing previlegdes and anyone is supposed to be able to read and write any of the folders in my iMac. Is this just how it is or is there anything I can do so I can access any files and folders in the iMac from the Macbook? I am not a computer wiz, and I clicked so many buttons and enabled things and am bit scared. I appreciate your help. Thank you.

I figured it out. I do "connect as" and log in as the user of the folder I want to access.